<template>
<div class="cmt-container">
  <h3>发表评论</h3>
  <hr>
  <textarea placeholder="请输入要BB的内容（做多吐槽120字）" maxlength="120" v-model="msg"></textarea>

  <mt-button type="primary" size="large" @click="Comment">发表评论</mt-button>

  <div class="cmt-list">
    <div class="cmt-item" v-for="(item, i) in comments" :key="i">
      <div class="cmt-title">
        第{{ i+1 }}楼&nbsp;&nbsp;用户：{{ item.user_name }}&nbsp;&nbsp;发表时间：{{ item.add_time | dateFormat }}
      </div>
      <div class="cmt-body">
        {{ item.content === '' ? '此用户很懒，嘛都没说': item.content }}
      </div>
    </div>

  </div>

  <mt-button type="danger" size="large" plain @click="getMore" class="button">加载更多</mt-button>
</div>
</template>

           
<script>
import {
  getComments,postComments
} from '../../api/index.js'
export default {
  data() {
    return {
      pageIndex: 0, // 默认展示第一页数据
      comments: [], // 所有的评论数据
      msg: ""
    }
  },
  created() {
    this.getMore()
  },
  methods: {
    getMore() {
      // 加载更多
      this.pageIndex++;
      // 获取评论
      getComments({
        id: this.id,
        pageIndex: this.pageIndex
      }).then(res => {
        if (res.status == 0) {
          this.comments = this.comments.concat(res.message)
        }
      })
    },
    Comment(){
      postComments({id: this.id, content: this.msg.trim()}).then(res => {
        console.log(res)
        if(this.msg.trim().length === 0){
          return '评论内容为空'
        }
        if(res.status === 0){
          var cmt = {
            user_name:"匿名用户",
            add_time: Date.now(),
            content: this.msg.trim()
          }
          this.comments.unshift(cmt);
          this.msg = "";
        }
      })
    }
  },
  props: ["id"]
}
</script>

<style lang="scss" scoped>
.cmt-container {
  h3 {
    font-size: 18px;
  }
  textarea {
    font-size: 14px;
    height: 85px;
    margin: 0;
  }
  .cmt-list {
    margin: 5px 0;
    .cmt-item {
      font-size: 13px;
      .cmt-title {
        line-height: 30px;
        background-color: #ccc;
      }
      .cmt-body {
        line-height: 35px;
        text-indent: 2em;
      }
    }
  }
}

.button {
  margin-bottom: 50px;
}
</style>
